/**
*  Copyright (c) 2011, Alex Theodoridis
*  All rights reserved.

*  Redistribution and use in source and binary forms, with 
*  or without modification, are permitted provided that the 
*  following conditions are met:
*  Redistributions of source code must retain the above 
*  copyright notice, this list of conditions and the following disclaimer.
*  Redistributions in binary form must reproduce the above 
*  copyright notice, this list of conditions and the following
*  disclaimer in the documentation and/or other materials 
*  provided with the distribution.

*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
*  AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
*  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
*  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
*  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
*  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
*  OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
*  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
*  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
*  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
*  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
*  ANY WAY OUT OF THE USE OF THIS SOFTWARE,
*  EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
*/

#include <Utilities/AutoLock/WinLockObject.h>

#ifdef _WIN32
namespace utils {

    WinLockObject::WinLockObject(void) {
        _mutex = CreateMutex(NULL, FALSE, NULL);
        if (_mutex != NULL) {
            ReleaseMutex(_mutex);
        }
    }

    WinLockObject::~WinLockObject(void) throw () {
        if (_mutex != NULL) {
            ReleaseMutex(_mutex);
            CloseHandle(_mutex);
        }
    }

    bool WinLockObject::unlock(void) const {
        if (_mutex != NULL) {
            ReleaseMutex(_mutex);
        } else {
            return false;
        }

        return true;
    }

    bool WinLockObject::lock(unsigned int waitTime) const {
        if (_mutex == NULL) {
            return false;
        }

        if (WaitForSingleObject(_mutex, waitTime) != WAIT_OBJECT_0) {
            return false;
        }

        return true;
    }
}

#endif
